For me, Maps is much faster to load than Google Earth.
OK, yes it is for the initial load by several seconds. However, once Maps is loaded, it takes what I consider WAY too much time to redraw the screen. I don't remember this time delay with previous macOS's. Google Earth wins this race hands down.
When I move the screen in Maps, all I see are "black squares" and then slowing the graphics fill in the map. VERY annoying when trying to move the displayed map left, right, up or down. Once I get to the new location I want to display, Maps is fine.